MIPS64: [turbofan] Implemented the TruncateFloat32ToUint64 TurboFan operator.

src/compiler/mips64/instruction-selector-mips64.cc

Index: src/compiler/mips64/instruction-selector-mips64.cc
diff --git a/src/compiler/mips64/instruction-selector-mips64.cc b/src/compiler/mips64/instruction-selector-mips64.cc
index 4ff2f493383cd55de0de3c8888c15178639ab99c..90b3e37221d7388a97eb1060b7946901f2a6ebce 100644
--- a/src/compiler/mips64/instruction-selector-mips64.cc
+++ b/src/compiler/mips64/instruction-selector-mips64.cc
@@ -742,7 +742,7 @@ void InstructionSelector::VisitTruncateFloat64ToInt64(Node* node) {
 
 
 void InstructionSelector::VisitTruncateFloat32ToUint64(Node* node) {
-  UNIMPLEMENTED();
+  VisitRR(this, kMips64TruncUlS, node);
 }